Yeah, the more I think about it, the stranger this story gets. It's not so easy biting someone's finger if they don't want you to bite it. Try it out. Have a volunteer hold their pointing finger straight out and them move it around a bit. You know, bob and weave. No, not tuck and run... bob and weave, jeeze. Then try and bite it without using your hands to hold their arm still. Very difficult thing to do. Had to be one really lucky chomp or the guy is some sort of Zen master.